In his first-ever interview, the sole Australian survivor of the Waco siege has revealed to 60 Minutes what really took place during the 51-day stand-off, and why he believes crazed cult leader David Koresh will one day return to Earth as the son of God.

Joyce denies bid for $50b rollout

Nationals leader Barnaby Joyce has rejected reports he is pushing for control of the federal government's $50 billion infrastructure rollout.

"I don't know where that story came from, it certainly didn't come from me," he told ABC radio on Tuesday.

Mr Joyce was responding to a report in The Australian that claimed the deputy prime minister was in discussions with colleagues about a possible move to consolidate the portfolio under his authority in an expected cabinet reshuffle in July.

Nationals minister Darren Chester has responsibility for the rollout now.

Mr Joyce has become concerned with a failure to "sell" the regional component of what is record infrastructure spending by a federal government and one of the few positive agenda issues for the coalition, The Australian said.

Nationals MP Damien Drum said both men were doing a "ripping job" in their existing roles.

"In my electorate water is the most important issue on an ongoing basis and Barnaby has been an amazing leader in that area," the member for Murray told reporters at Parliament House.